Expressive Calculator

As useful as the spreadsheet, and as simple as the calculator.
Expressive calculator is the brand new type of the calculator.
Any stressful calculation is much easy, if you register only once.
You don't need to press same key more, when you calculate similar to the previous one.
Expressive calculator is the calculator which can register the expression by the word.
You finally finish inputting long calculation, but only one change or mistake makes all the bad.
I know that you want to cry when you input all of them again.
So, say Good Bye to the classic calculator until now.
And say Hello to the brand new type of the calculator.

Let's check it out "splitting bill"as a example of use case.
Classic Calculator
(100+25+20)÷6
Expressive Calculator
(Meal charges+Gasoline fee+Gift)÷number of people

Anyone can calculate any number of times without any mistakes.
This is the expressive calculator.